#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

get_app_settings

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=1

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICES
#=================================================
ynh_script_progression --message="Stopping systemd services..." --weight=1

ynh_systemd_action --service_name=$app.socket --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app-beat --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app-celery --action="stop" --log_path="/var/log/$app/$app.log"

systemctl disable $app.socket --quiet
systemctl disable $app --quiet
systemctl disable $app-beat --quiet
systemctl disable $app-celery --quiet

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1

if [ -z "$datadir" ]; then
	datadir=$(ynh_app_setting_get --app=$app --key=data_path)
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
	ynh_app_setting_delete --app=$app --key=data_path
	ynh_app_setting_delete --app=$app --key=db_pwd
	ynh_app_setting_delete --app=$app --key=admin_email
fi

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

set_permissions

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE VIRTUALENV
#=================================================
ynh_script_progression --message="Upgrading Python virtualenv..." --weight=2

set_up_virtualenv

#=================================================
# PERFORM DATABASE MIGRATIONS
#=================================================
ynh_script_progression --message="Performing database migrations..." --weight=2

upgrade_db

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config
ynh_add_systemd_config --service="$app-socket" --template systemd.socket
ynh_add_systemd_config --service="$app-celery" --template systemd-celery.service
ynh_add_systemd_config --service="$app-beat" --template systemd-beat.service
systemctl disable "$app-socket.service" --quiet
mv "/etc/systemd/system/$app-socket.service" "/etc/systemd/system/$app.socket"
systemctl daemon-reload --quiet

#=================================================
# GENERIC FINALIZATION
#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description="Manage podcast subscriptions, and sync them between apps and devices" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting systemd services..." --weight=1

ynh_systemd_action --service_name=$app.socket --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app-celery --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=$app-beat --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed" --last